Which of the following statements is not corr | vedclass

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(C) The ground state electronic configuration of a chromium $(Cr)$ atom $(Z=24)$ is $[Ar] 3d^5 4s^1$.$(A)$ It has $5$ electrons in $3d$ and $1$ electr

Vedclass · Accepted Answer

It has $6$ electrons in $3d$ orbital.

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(C) The ground state electronic configuration of a chromium $(Cr)$ atom $(Z=24)$ is $[Ar] 3d^5 4s^1$.$(A)$ It has $5$ electrons in $3d$ and $1$ electron in $4s$ orbitals,which is correct.$(B)$ The valence electrons are in the $3d$ $(n=3)$ and $4s$ $(n=4)$ orbitals,which is correct.$(C)$ It has $5$ electrons in the $3d$ orbital,not $6$. Thus,this statement is incorrect.$(D)$ For $4s$ electrons,$l=0$ ($s$-orbital),and for $3d$ electrons,$l=2$ ($d$-orbital),which is correct.Therefore,the incorrect statement is $(C)$.

Which of the following statements is not correct about the electronic configuration of a gaseous chromium $(Cr)$ atom?

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